Contextual Info: GE C P L E S S E Y S E M I C O N D U C T O R S [ DS3147-1.1 Supersedes C D 8 0 4 D 2 . 1 MA535 DTMF DIALLER WITH REDIAL The MA53S is a low power CMOS DTMF dialler with a 21-digit last number redial store. The device is capable of